transportation heart a

Structure - The human heart is a muscular, cone-shaped, hollow organ about the size of a fist (about 12cm in length and 9cm in breadth). The heart is situated behind the sternum, between the lungs in the thoracic cavity. The heart is tilted slightly such that its apex ..

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Control of the Heart Function - The control of the heart function is by a set of muscles and is, therefore, called myogenic . If the heart is removed from a living mammal and placed in a well oxygenated salt solution maintained at 37 o C, the heart continues ..

+ve and Rh-ve, based on the presence or absence of Rhesus factor, an antigen. In human circulatory system the blood is flows in closed blood vessels called the arteries, veins and their capillaries. Arteries and veins have elastic and muscular walls. Capillaries lack muscles. Arteries arise from th..

The human heart is a muscular, cone-shaped, hollow organ about the size of a fist (about 12cm in length and 9cm in breadth). The heart is situated behind the sternum, between the lungs in the thoracic cavity. The heart is tilted slightly such that its apex is towards ..

The components of the closed circulatory system in man are: A fluid that can carry all the materials to be transported ( blood ) A pumping organ that can push the fluid through the body - as time taken is important ( heart ) Many tubes through which the fluid can flow throu..

After the food is broken down into a soluble form, the intestinal walls of ileum absorb the nutrients and also water. Due to its larger surface area, thin wall lining the cavity and large number of finger-like projections, called the villi, maximum absorption takes place in this portion of th..

Absorption - After the food is broken down into a soluble form, the intestinal walls of ileum absorb the nutrients and also water. Due to its larger surface area, thin wall lining the cavity and large number of finger-like projections, called the villi, maximum absorption takes place in this portio..

The passage of blood throughout the body under the influence of the pressure exerted by the heart is called circulation. In mammals and birds the circulation is called double circulation. This is because the blood passes twice through the heart during one round of circulation. T..